Waste treatment equipment for comprehensive utilization of jarosite slag

Abstract

The invention relates to the technical field of waste treatment equipment, in particular to waste treatment equipment for comprehensive utilization of jarosite slag.The waste treatment equipment comprises a circulating oxidation stirring device installed on a waste liquid mixing barrel, and the circulating oxidation stirring device comprises a flowing mixing pipe installed in the waste liquid mixing barrel; a circulating oxygenation pipe is installed at the liquid inlet end of the flowing mixing pipe and used for injecting air into circulating waste acidic liquid, the liquid inlet end of the circulating oxygenation pipe is communicated with the bottom of the liquid waste mixing barrel, a circulating conveying pump and an electromagnetic valve are installed on the circulating oxygenation pipe, and the circulating conveying pump provides suction force for the circulating oxygenation pipe. The waste acid waste liquid treatment efficiency and effect can be effectively improved, and meanwhile manpower is saved.

Description

Technical Field

[0001] The present invention relates to the technical field of waste treatment equipment, and in particular to a waste treatment equipment for comprehensive utilization of iron alum slag. Background Art

[0002] Jarosite residue is a typical acidic metallurgical waste residue produced by the iron removal process of the jarosite method in the wet zinc smelting process. It is an iron-containing sulfate-type hazardous solid waste. Its main components are Fe (20% to 30%), S (10% to 15%), Zn (2% to 5%) and trace amounts of heavy metal elements such as As, Cd, Pb, Ga, In, etc. The physical composition is mainly jarosite (KFe3(SO4)2(OH)6), accompanied by stable mineral phases such as zinc-iron spinel (ZnFe2O4) and zinc silicate (Zn2SiO4). Because the slag is rich in sulfate and heavy metal ions, it is easily leached by rainwater for a long time, resulting in acidic leachate (pH 1.5 to 3.0) and heavy metal ions (such as As). 3+ 、Cd 2+ ) migration, posing a serious threat to soil and groundwater ecosystems. Currently, the global zinc smelting industry emits approximately 50% of zinc production annually. However, due to its complex mineral structure and the stability of heavy metal occurrence, the resource utilization rate is less than 10%. There is an urgent need to develop efficient and green co-processing technologies to achieve the dual goals of environmental risk management and valuable metal recovery.

[0003] Chinese patent number CN110255770B discloses a method for treating arsenic in non-ferrous smelting waste acid by using jarosite slag in conjunction with carbide slag, belonging to the field of heavy metal pollution control technology. The present invention mixes jarosite slag and carbide slag evenly, and ball-mills the mixture until the particle size is no more than 0.56 μm to obtain a mixed slag powder; the mixed slag powder and potassium permanganate are added to the waste acid and mixed evenly, and air is continuously introduced under stirring conditions and an oxidative dearsenicization reaction is carried out for 24 to 36 hours to obtain a solid-liquid mixture; the solid-liquid mixture is separated into solid-liquid to obtain an arsenic-containing solid and a filtrate, the arsenic-containing solid is stored for treatment, and the filtrate enters the next step of deep arsenic removal treatment. The present invention uses jarosite slag in conjunction with carbide slag to remove arsenic from waste acid, with excellent arsenic removal effect, simple process operation, low production cost, and less sludge produced after arsenic removal, which alleviates the problem of large sludge stockpiles.

[0004] The aforementioned device has established a certain application basis for the arsenic fixation technology using jarosite slag in conjunction with carbide slag in the treatment of waste acid from non-ferrous metal smelting. Existing technical solutions are generally based on a synergistic mechanism of oxidation adsorption. A mixed slag powder of jarosite slag and potassium permanganate are mixed with waste acid through mechanical stirring equipment, and air oxidation is used to achieve the arsenic form transformation and fixation. However, the above technical solutions have the following technical problems in actual industrial application:

[0005] 1. Traditional stirring devices have significant limitations in achieving uniform mixing of waste acid, slag, and air. Mechanical stirring has a weak ability to renew the gas-liquid interface, resulting in a low oxygen mass transfer rate, which slows the oxidation process and requires up to 24 hours of continuous aeration and stirring. This leads to high energy consumption and long operation cycles, resulting in low treatment efficiency. Furthermore, the mixed slag powder of jarosite slag settles or agglomerates due to density differences, causing uneven distribution of oxidation in the reaction system, affecting the adsorption capacity and stability of arsenic.

[0006] 2. In the existing process, the addition of mixed slag powder of jarosite slag and potassium permanganate relies on manual proportioning and step-by-step addition. There are many manual operation links and poor process controllability, which makes it difficult to adapt to the fluctuation of waste acid composition and the needs of continuous treatment. Summary of the Invention

[0007] In response to the above problems, a waste treatment equipment for the comprehensive utilization of iron alum slag is provided. The circulating oxidation stirring device can effectively improve the efficiency and effect of the treatment of contaminated acid waste liquid, while saving manpower.

[0008] In order to solve the problems of the existing technology, the present invention provides a waste treatment equipment for the comprehensive utilization of iron alum slag, including a circulating oxidation stirring device installed on a waste liquid mixing barrel, the circulating oxidation stirring device includes a flow mixing tube installed inside the waste liquid mixing barrel, and a circulating oxygenation tube is installed at the liquid inlet end of the flow mixing tube. The circulating oxygenation tube is used to inject air into the circulating dirty acid waste liquid. The liquid inlet end of the circulating oxygenation tube is connected to the bottom of the waste liquid mixing barrel. A circulating delivery pump and a solenoid valve are installed on the circulating oxygenation tube. The circulating delivery pump provides suction force for the circulating oxygenation tube.

[0009] Preferably, a driving blade is provided inside the flow mixing tube, a plurality of stirring rods and stirring blades are provided on the flow mixing tube, and a plurality of diffusion holes are provided on the stirring rods.

[0010] Preferably, a plurality of spiral guide vanes are evenly distributed on the inner wall of the circulating aeration pipe, a plurality of air delivery holes are evenly distributed on the inner wall of the circulating aeration pipe, and an air guide sleeve is installed on the outer side of the circulating aeration pipe to guide the air flow to the air delivery holes.

[0011] Preferably, the circulating oxidation stirring device also includes a plurality of adaptive mixing and feeding devices, which include an assembled shell, a mixing wheel installed inside the assembled shell, a main flow hole provided at the axial position of the mixing wheel, a plurality of quantitative grooves provided on the outside of the mixing wheel, a rotating extrusion wheel also installed next to the mixing wheel, and a feed pipe installed above the assembled shell.

[0012] Preferably, a mixing guide track is provided inside the assembled shell, a feed port is provided above the mixing guide track, a first annular baffle plate and a second annular baffle plate are provided inside the mixing guide track, the first annular baffle plate and the second annular baffle plate are both provided with regional flow holes, and the second annular baffle plate is also provided with a one-way flow blocking port.

[0013] Preferably, a flow mounting plate is installed inside the one-way flow blocking port, a one-way flow hole is provided on the flow mounting plate, and a floating membrane is also installed inside the one-way flow blocking port.

[0014] Preferably, each quantitative groove of the mixing wheel is equipped with a quantitative adjustment device for adjusting the capacity of the quantitative groove, and the main flow hole of the mixing wheel is equipped with a mixing blade for causing the waste acid liquid to generate a spiral flow.

[0015] Preferably, a plurality of movable push plates are installed on the rotating extrusion wheel, a push spring is installed between the movable push plate and the rotating extrusion wheel, an extrusion tool is also installed on the movable push plate, and an extrusion roller matching the quantitative groove is installed on the extrusion tool.

[0016] Preferably, a rotating wheel is rotatably mounted on the feed pipe, and a plurality of material-moving blades are provided inside the rotating wheel.

[0017] Preferably, a one-way filter tube is installed at the liquid outlet end of the mixing guide track, a conical filter layer is provided inside the one-way filter tube, a movable sealing plug is also installed inside the one-way filter tube, and a reset spring is installed between the movable sealing plug and the one-way filter tube.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The present invention achieves continuous and efficient mixing of waste acid waste liquid and air by introducing a circulating aeration tube, combined with a circulating delivery pump and a solenoid valve. The circulating aeration tube directly mixes air into the flowing waste acid waste liquid, significantly enhancing the renewal capacity of the gas-liquid interface and increasing the oxygen mass transfer rate. This design not only accelerates the oxidation process but also ensures more rapid and thorough transformation and fixation of arsenic forms in the waste acid waste liquid. Simultaneously, the flowing mixing tube rotates under the action of fluid dynamics, further enhancing the mixing uniformity within the waste acid waste liquid and preventing sedimentation or agglomeration of the jarosite slag mixed slag powder, thereby improving the adsorption capacity and stability of arsenic.

[0020] 2. Conventional stirring devices rely on long periods of continuous stirring, resulting in high energy consumption and low processing efficiency. However, the present invention utilizes a cyclic oxidation stirring mechanism, effectively shortening the oxidation process time and reducing energy consumption. Furthermore, the improved mixing uniformity makes the arsenic form conversion in the reaction system more efficient, thereby improving overall processing efficiency. This not only helps reduce production costs but also enhances the industrial feasibility of the device.

[0021] 3. The adaptive mixing and feeding device integrated in this invention, through the cooperation of a synchronous drive device and a flow rate sensor, achieves a stable mixing ratio of jarosite slag mixed slag powder, potassium permanganate, and waste acid waste liquid. This design reduces manual operation steps and improves the controllability and adaptability of the process. Regardless of the flow rate of the waste acid waste liquid, the adaptive mixing and feeding device can adjust the speed of the mixing wheel based on real-time monitoring data to ensure accurate addition of the mixed slag powder and potassium permanganate. This not only improves the stability of the treatment process, but also provides strong support for continuous processing requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional schematic diagram of a waste treatment device for comprehensive utilization of iron alum slag according to the present invention.

[0023] Figure 2 It is a planar cross-sectional view of a waste treatment device for comprehensive utilization of iron alum slag according to the present invention.

[0024] Figure 3 It is a planar sectional stereoscopic diagram of a waste treatment device for comprehensive utilization of iron alum slag according to the present invention.

[0025] Figure 4 yes Figure 3 A partial enlarged view of point A in the middle.

[0026] Figure 5 It is a three-dimensional schematic diagram of an adaptive mixing feeding device in a waste treatment equipment for comprehensive utilization of iron alum slag according to the present invention.

[0027] Figure 6 This is a front view of an adaptive mixing feeding device of a waste treatment equipment for comprehensive utilization of iron alum slag according to the present invention.

[0028] Figure 7 yes Figure 6 Plane sectional view at section BB.

[0029] Figure 8 The invention is a decomposition method of an adaptive mixed feeding device in a waste treatment equipment for comprehensive utilization of iron alum slag Figure 1 .

[0030] Figure 9 yes Figure 8 A partial enlarged view of point C in the middle.

[0031] Figure 10 The invention is a decomposition method of an adaptive mixed feeding device in a waste treatment equipment for comprehensive utilization of iron alum slag Figure 2 .

[0032] Figure 11 yes Figure 10 A partial enlarged view of point D in the middle.

[0033] The numbers in the figure are:

[0034] 1. Waste liquid mixing barrel; 2. Flow mixing tube; 21. Drive blade; 22. Stirring rod; 23. Stirring blade; 3. Circulating oxygenation tube; 31. Circulating delivery pump; 32. Solenoid valve; 33. Spiral guide vane; 34. Air delivery hole; 35. Air guide sleeve; 4. Adaptive mixing feed device; 41. Assembled shell; 411. Mixing guide track; 412. First annular baffle; 4121. Regional flow hole; 413. Second annular baffle; 4131. One-way flow blocking port; 4132. Circulation mounting plate; 41 33. Floating membrane; 42. Mixing wheel; 421. Main flow hole; 422. Dosing slot; 423. Dosing adjustment device; 424. Mixing blade; 43. Rotating extrusion wheel; 431. Movable push plate; 4311. Push spring; 432. Extrusion tool; 4321. Extrusion roller; 44. Feed pipe; 441. Rotating wheel; 442. Dispensing blade; 45. One-way filter tube; 451. Cleaning port; 452. Conical filter layer; 453. Return spring; 454. Movable sealing plug; 46. Synchronous drive device. DETAILED DESCRIPTION

[0035] In order to further understand the features, technical means, specific objectives and functions achieved by the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] See also Figures 1 to 11 As shown, a waste treatment equipment for comprehensive utilization of iron alum slag includes a circulating oxidation stirring device installed on a waste liquid mixing barrel 1, the circulating oxidation stirring device includes a flow mixing tube 2 installed inside the waste liquid mixing barrel 1, a circulating oxygenation tube 3 is installed at the liquid inlet end of the flow mixing tube 2, the circulating oxygenation tube 3 is used to inject air into the circulating dirty acid waste liquid, the liquid inlet end of the circulating oxygenation tube 3 is connected to the bottom of the waste liquid mixing barrel 1, a circulating delivery pump 31 and a solenoid valve 32 are installed on the circulating oxygenation tube 3, and the circulating delivery pump 31 provides suction force for the circulating oxygenation tube 3.

[0037] A plurality of electromagnetic valves 32 are also installed on the circulation oxygenation pipe 3. The circulation oxygenation pipe 3 is connected to the air delivery pump.

[0038] The liquid inlet end of the mobile mixing tube 2 is connected with a circulation aeration pipe 3, and the effect of the circulation aeration pipe 3 is that air is effectively mixed into the flowing dirty acid waste liquid.The liquid inlet end of the circulation aeration pipe 3 is directly connected to the bottom of the waste liquid mixing barrel 1, to ensure that the dirty acid waste liquid in the bottom can be extracted.On the circulation aeration pipe 3, a circulation delivery pump 31 and a solenoid valve 32 are installed, and the circulation delivery pump 31 provides necessary suction force to drive the circulating flow of the dirty acid waste liquid in the pipeline, and the solenoid valve 32 is used to regulate the flow state of the pipeline.In addition, the circulation aeration pipe 3 is also connected with an air delivery pump, and the air delivery pump is responsible for conveying air in the circulation aeration pipe 3.

[0039] When the equipment is in operation, the operator first mixes the mixed slag powder of jarosite slag and potassium permanganate with the waste acid waste liquid in a proportional manner and transfers the mixture to the waste liquid mixing drum 1. Subsequently, by opening the solenoid valve 32 on the circulating aeration pipe 3, the circulating delivery pump 31 is activated. The pump's suction force draws the waste acid waste liquid from the bottom of the waste liquid mixing drum 1 into the circulating aeration pipe 3. As the waste acid waste liquid flows through the circulating aeration pipe 3, air delivered by the air delivery pump is mixed in, forming a gas-liquid mixture.

[0040] Simultaneously, as the acid waste liquid flows through the circulating aeration tube 3, the fluid mixing tube 2 is subjected to hydrodynamic forces, causing it to rotate. This rotation not only enhances the mixing of the acid waste liquid within the fluid mixing tube 2 but also, through its agitation, diffuses the air-laden acid waste liquid throughout the waste liquid mixing tank 1. Once air enters the waste liquid mixing tank 1, it naturally flows upward due to density differences, further promoting uniform contact between the acid waste liquid and the air, thereby significantly improving the treatment efficiency of the acid waste liquid.

[0041] The solenoid valve 32 and the air pump are prior art and are not described in detail here.

[0042] See also Figures 1 to 3 As shown, a driving blade 21 is provided inside the flow mixing tube 2 , a plurality of stirring rods 22 and stirring blades 23 are provided on the flow mixing tube 2 , and a plurality of diffusion holes are provided on the stirring rods 22 .

[0043] The flow mixing tube 2 is rotatably mounted within the waste liquid mixing barrel 1. Drive blades 21 are designed within the flow mixing tube 2, responding to the dynamic forces of the fluid flowing over its surface. Furthermore, the outer wall of the flow mixing tube 2 is equipped with multiple stirring rods 22 and stirring blades 23. The stirring rods 22 are further provided with multiple diffusion holes to optimize the diffusion and mixing of the acid waste liquid.

[0044] When the equipment begins operation, the circulating aeration pipe 3, under the suction force of the circulating transfer pump 31, draws the acid waste liquid from the bottom of the waste liquid mixing barrel 1 and transfers it into the flow mixing pipe 2. As the acid waste liquid flows through the drive blades 21, the changes in flow velocity and the impact of the fluid cause the drive blades 21 to be subjected to force and begin to rotate. This rotational motion then drives the entire flow mixing pipe 2 to rotate within the waste liquid mixing barrel 1.

[0045] As the flow mixing tube 2 rotates, the stirring rod 22 and stirring blades 23 also move, stirring the surrounding waste acid liquid. The design of the stirring blades 23 enables them to effectively cut, fold, and redistribute the waste acid liquid, thereby increasing the turbulence within the waste acid liquid and promoting the dispersion of solid particles such as mixed slag powder and potassium permanganate in the waste acid liquid.

[0046] At the same time, the diffusion holes in the stirring rod 22 allow the waste acid liquid to pass through during the stirring process. The presence of the diffusion holes not only increases the flow path of the waste acid liquid but also promotes its uniform distribution within the mixing barrel. When the waste acid liquid is ejected from the diffusion holes, it forms tiny droplets or streams, further increasing the contact area between the waste acid liquid and the air, facilitating the dissolution of oxygen in the air into the waste acid liquid and improving oxidation efficiency.

[0047] See also Figures 1 to 4 As shown, a plurality of spiral guide vanes 33 are evenly distributed on the inner wall of the circulating aeration pipe 3, and a plurality of gas delivery holes 34 are evenly distributed on the inner wall of the circulating aeration pipe 3. An air guide sleeve 35 is installed on the outer side of the circulating aeration pipe 3 to guide the air flow to flow toward the gas delivery holes 34.

[0048] The air guide sleeve 35 is connected to the air pump. The circulating aeration pipe 3 efficiently mixes air into the flowing acid wastewater. Multiple spiral guide vanes 33 are evenly spaced along the inner wall of the circulating aeration pipe 3, guiding the acid wastewater in a spiral motion. Furthermore, multiple air delivery holes 34 are evenly distributed along the inner wall of the circulating aeration pipe 3 for introducing external air into the wastewater.

[0049] To introduce air, the outer side of the circulating aeration pipe 3 is equipped with an air guide sleeve 35, which is connected to an air pump. When the equipment is running, the air pump starts and pumps air into the air guide sleeve 35. The air is then guided by the air guide sleeve 35, evenly flowing to the various air delivery holes 34 in the circulating aeration pipe 3 and injected into the circulating waste acid wastewater.

[0050] As the acid wastewater flows through the circulating aeration pipe 3, it is acted upon by the spiral guide vanes 33, generating a spiral rotation. This rotation not only increases the turbulence within the wastewater but also promotes sufficient contact and mixing between the wastewater and the air entering through the air delivery holes 34. The synergistic effect of the spiral rotation and the air input allows the air to be evenly dispersed throughout the acid wastewater, ensuring a uniform gas-liquid mixture.

[0051] See also Figures 1 to 8 As shown, the circulating oxidation stirring device also includes a plurality of adaptive mixing and feeding devices 4, which include an assembled shell 41. A mixing wheel 42 is installed inside the assembled shell 41. A main flow hole 421 is provided at the axial position of the mixing wheel 42. A plurality of quantitative grooves 422 are provided on the outside of the mixing wheel 42. A rotating extrusion wheel 43 is also installed next to the mixing wheel 42. A feed pipe 44 is installed above the assembled shell 41.

[0052] Multiple adaptive mixing and feeding devices 4 are interconnected, and the liquid outlet of the assembled housing 41 is connected to the circulating oxygenation pipe 3. The adaptive mixing and feeding devices 4 also include a synchronous drive device 46 mounted on the assembled housing 41. The driving end of the synchronous drive device 46 is respectively connected to the mixing wheel 42, the rotating extrusion wheel 43, and the feed pipe 44. The synchronous drive device 46 also includes a flow rate sensor mounted on the assembled housing 41.

[0053] The waste acid liquid enters the assembled housing 41 through a delivery pipe. A flow rate sensor monitors its flow rate in real time. When the flow rate sensor detects the flow of waste acid liquid, the synchronous drive device 46 activates, driving the mixing wheel 42, the rotating extrusion wheel 43, and the feed pipe 44 to rotate synchronously. The main flow hole 421 of the mixing wheel 42 circulates the waste acid liquid, while the multiple metering slots 422 on the outside of the mixing wheel 42 temporarily store and release the mixed slag powder or potassium permanganate. When the metering slots 422 move below the feed pipe 44, the feed pipe 44 rotates to transfer the mixed slag powder or potassium permanganate into the metering slots 422. As the mixing wheel 42 continues to rotate, the mixed slag powder or potassium permanganate in the metering slots 422 is carried away by the waste acid liquid, thereby mixing with the waste acid liquid. The rotating extrusion wheel 43 rotates synchronously, squeezing the metering slots 422 on the outside of the mixing wheel 42, removing excess waste acid liquid and ensuring that the metering slots 422 can better receive the subsequent mixed slag powder or potassium permanganate. The synchronous driving device 46 adjusts the rotation speed of the mixing wheel 42 according to the flow rate of the dirty acid waste liquid to achieve stable mixing ratio.

[0054] The mixed slag powder of jarosite slag, potassium permanganate and dirty acid waste liquid are mixed in a stable ratio, which reduces the manual operation links and improves the controllability and adaptability of the process.

[0055] The synchronous drive device 46 is a conventional transmission technology and is not described in detail here.

[0056] See also Figures 5 to 10 As shown, a mixing guide track 411 is provided inside the assembled shell 41, a feed port is provided above the mixing guide track 411, a first annular baffle plate 412 and a second annular baffle plate 413 are provided inside the mixing guide track 411, and regional flow holes 4121 are provided on the first annular baffle plate 412 and the second annular baffle plate 413, and a one-way flow blocking port 4131 is also provided on the second annular baffle plate 413.

[0057] The assembled shell 41 is detachable, which makes it easy for staff to maintain the devices inside the assembled shell 41.

[0058] The dirty acid waste liquid enters the mixing guide track 411 of the assembled shell 41 through the conveying pipe. The mixing wheel 42 rotates under the drive of the synchronous drive device 46, and the metering groove 422 moves with the rotation of the mixing wheel 42. When the metering groove 422 moves to the regional flow hole 4121 between the first annular baffle plate 412 and the second annular baffle plate 413, the flowing dirty acid waste liquid enters the metering groove 422 through the regional flow hole 4121, washes away the mixed slag powder or potassium permanganate in the metering groove 422, and achieves mixing with the dirty acid waste liquid. The design of the first annular baffle plate 412 and the second annular baffle plate 413 effectively blocks the two ends of the metering groove 422, preventing the dirty acid waste liquid from flowing out when the metering groove 422 is not completely filled or the mixed slag powder / potassium permanganate is not completely released.

[0059] As mixing wheel 42 continues to rotate, metering trough 422 moves into contact with rotating extrusion wheel 43. Rotating extrusion wheel 43 squeezes metering trough 422, forcing excess acid waste liquid out through one-way flow blockage 4131. This ensures metering trough 422 is better able to receive the subsequent mixed slag powder or potassium permanganate. Synchronous drive device 46 adjusts the speed of mixing wheel 42 based on the flow rate of the acid waste liquid as monitored by the flow rate sensor to achieve stable mixing.

[0060] See also Figure 8 and Figure 9 As shown, a flow mounting plate 4132 is installed inside the one-way flow blocking port 4131 , and a one-way flow hole is provided on the flow mounting plate 4132 . A floating membrane 4133 is also installed inside the one-way flow blocking port 4131 .

[0061] A circulation mounting plate 4132 is designed inside the one-way flow choke 4131, and a one-way flow hole is provided on the circulation mounting plate 4132 to guide the extruded dirty acid waste liquid to be discharged. In addition, a floating membrane 4133 is also installed inside the one-way flow choke 4131. During operation, when the metering tank 422 is squeezed by the rotating extrusion wheel 43, the excess dirty acid waste liquid in the metering tank 422 is forced to be discharged through the one-way flow choke 4131. At this time, the dirty acid waste liquid flows out smoothly through the one-way flow hole on the circulation mounting plate 4132. It is important to note that when the dirty acid waste liquid in the mixing guide track 411 attempts to flow back through the one-way flow hole, the floating membrane 4133 will float in response to the fluid pressure, fit tightly around the flow hole, and effectively block the one-way flow hole, thereby preventing the reverse flow of the dirty acid waste liquid.

[0062] See also Figures 7 to 10 As shown, each quantitative groove 422 of the mixing wheel 42 is equipped with a quantitative adjustment device 423, which is used to adjust the capacity of the quantitative groove 422. The main flow hole 421 of the mixing wheel 42 is equipped with a mixing blade 424, which makes the dirty acid waste liquid produce a spiral flow.

[0063] The main flow hole 421 at the axis of the mixing wheel 42 allows the waste acid liquid to flow, and the mixing blades 424 installed in the main flow hole 421 guide the waste acid liquid passing through in a spiral rotation. The spiral flow pattern helps to enhance the mixing effect of the waste acid liquid and the subsequently added substances.

[0064] The outer side of the mixing wheel 42 is equipped with multiple metering slots 422, which are used to temporarily store and release the mixed slag powder or potassium permanganate. To precisely control the capacity of the metering slots 422, each metering slot 422 is equipped with a metering adjustment device 423. The metering adjustment device 423 is detachably connected to the metering slot 422, allowing staff to easily replace metering adjustment devices 423 of different sizes according to actual needs, thereby adjusting the storage capacity of the metering slot 422 and achieving precise control of the mixing ratio.

[0065] As the mixing wheel 42 rotates, driven by the synchronous drive device 46, the metering troughs 422 move sequentially below the feed pipe 44 as the mixing wheel 42 rotates. At this point, the feed pipe 44 rotates to precisely deliver the mixed slag powder or potassium permanganate into the metering troughs 422. As the mixing wheel 42 continues to rotate, the mixed slag powder or potassium permanganate carried by the metering troughs 422 is carried away by the spirally flowing waste acid waste liquid, thereby mixing with the waste acid waste liquid.

[0066] See also Figures 8 to 11As shown, a plurality of movable push plates 431 are installed on the rotating extrusion wheel 43, a pushing spring 4311 is installed between the movable push plate 431 and the rotating extrusion wheel 43, an extrusion tool 432 is also installed on the movable push plate 431, and an extrusion roller 4321 matching the quantitative groove 422 is installed on the extrusion tool 432.

[0067] The rotating extrusion wheel 43 rotates synchronously with the mixing wheel 42. A plurality of movable push plates 431 are mounted on the rotating extrusion wheel 43. The movable push plates 431 are connected to the rotating extrusion wheel 43 via push springs 4311, allowing the movable push plates 431 to move elastically. Mounted on the movable push plates 431 is an extrusion tool 432, which is equipped with extrusion rollers 4321 that mate with the metering grooves 422 on the mixing wheel 42. During rotation, the extrusion rollers 4321 periodically contact and squeeze the metering grooves 422 as the rotating extrusion wheel 43 rotates. The interaction between the movable push plates 431 and the push springs 4311 allows the extrusion tool 432 to apply appropriate pressure to the metering grooves 422, effectively squeezing out excess acid waste liquid from the metering grooves 422. This design ensures that the metering grooves 422 remain optimally filled when receiving subsequent mixed slag powder or potassium permanganate, improving mixing efficiency and proportioning accuracy. At the same time, the detachable connection design between the movable push plate 431 and the extruder 432 makes it easy for staff to adjust and maintain according to actual needs.

[0068] See also Figures 5 to 7 As shown, a rotating wheel 441 is rotatably mounted on the feed pipe 44 , and a plurality of material-moving blades 442 are provided inside the rotating wheel 441 .

[0069] The feed port of the assembled housing 41 is connected to a feed pipe 44, on which a rotating wheel 441 is rotatably mounted. This feed pipe 44 connects to a storage area for mixed slag powder or potassium permanganate, enabling continuous material transport. Inside the feed pipe 44, a rotating wheel 441 is configured to rotate and includes multiple evenly distributed paddle blades 442.

[0070] As mixing wheel 42 rotates, driven by synchronous drive device 46, it simultaneously drives rotating wheel 441 on feed pipe 44. The material-dispensing blades 442 within rotating wheel 441 rotate in tandem with the rotation of rotating wheel 441. These blades effectively displace the mixed slag powder or potassium permanganate in feed pipe 44, ensuring a uniform and stable flow of the materials toward and into contact with mixing wheel 42. This prevents material blockage during the feeding process while ensuring continuous and uniform feeding, thereby optimizing material proportioning and mixing efficiency throughout the waste treatment process.

[0071] See also Figures 5 to 7As shown, a one-way filter tube 45 is installed at the liquid outlet end of the mixing guide track 411, a conical filter layer 452 is provided inside the one-way filter tube 45, and a movable sealing plug 454 is also installed inside the one-way filter tube 45. A reset spring 453 is installed between the movable sealing plug 454 and the one-way filter tube 45.

[0072] A one-way filter tube 45 is installed at the end of the mixing guide track 411. Inside this tube 45, a conical filter layer 452 is configured to filter large particles of impurities from the acid wastewater, ensuring wastewater quality. Furthermore, the one-way filter tube 45 has a built-in movable seal 454. A return spring 453 is installed between the seal 454 and the tube body to achieve one-way flow and prevent backflow. A cleaning port 451 is located below the one-way filter tube 45, allowing personnel to open the one-way filter tube 45 and clean and maintain the conical filter layer 452.

[0073] As the contaminated acid waste liquid is introduced into the one-way filter tube 45 via the mixing guide track 411, the conical filter layer 452 first exerts its filtering effect, intercepting and retaining large particles of impurities. Subsequently, the waste liquid continues to advance, acting on the movable sealing plug 454, overcoming the preload of the return spring 453, causing the movable sealing plug 454 to temporarily open and allow the waste liquid to pass through. During this process, the return spring 453 is under pressure. Once the delivery of the contaminated acid waste liquid is terminated, the movable sealing plug 454 is quickly reset under the elastic force of the return spring 453, effectively preventing the backflow of waste liquid or filtered impurities, thereby ensuring the one-way flow characteristics of the one-way filter tube 45 and the overall stability and efficiency of the system.

[0074] Specific working principle:

[0075] The liquid inlet end of the mobile mixing tube 2 is connected with a circulation aeration pipe 3, and the effect of the circulation aeration pipe 3 is that air is effectively mixed into the flowing dirty acid waste liquid.The liquid inlet end of the circulation aeration pipe 3 is directly connected to the bottom of the waste liquid mixing barrel 1, to ensure that the dirty acid waste liquid in the bottom can be extracted.On the circulation aeration pipe 3, a circulation delivery pump 31 and a solenoid valve 32 are installed, and the circulation delivery pump 31 provides necessary suction force to drive the circulating flow of the dirty acid waste liquid in the pipeline, and the solenoid valve 32 is used to regulate the flow state of the pipeline.In addition, the circulation aeration pipe 3 is also connected with an air delivery pump, and the air delivery pump is responsible for conveying air in the circulation aeration pipe 3.

[0076] When the equipment is in operation, the operator first mixes the mixed slag powder of jarosite slag and potassium permanganate with the waste acid waste liquid in a proportional manner and transfers the mixture to the waste liquid mixing drum 1. Subsequently, by opening the solenoid valve 32 on the circulating aeration pipe 3, the circulating delivery pump 31 is activated. The pump's suction force draws the waste acid waste liquid from the bottom of the waste liquid mixing drum 1 into the circulating aeration pipe 3. As the waste acid waste liquid flows through the circulating aeration pipe 3, air delivered by the air delivery pump is mixed in, forming a gas-liquid mixture.

[0077] Simultaneously, as the acid waste liquid flows through the circulating aeration tube 3, the fluid mixing tube 2 is subjected to hydrodynamic forces, causing it to rotate. This rotation not only enhances the mixing of the acid waste liquid within the fluid mixing tube 2 but also, through its agitation, diffuses the air-laden acid waste liquid throughout the waste liquid mixing tank 1. Once air enters the waste liquid mixing tank 1, it naturally flows upward due to density differences, further promoting uniform contact between the acid waste liquid and the air, thereby significantly improving the treatment efficiency of the acid waste liquid.

[0078] The above embodiments merely represent one or more embodiments of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of protection of the present invention. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present invention, and such modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the appended claims.

Claims

1. A waste treatment device for comprehensive utilization of iron alum slag, comprising a circulating oxidation stirring device installed on a waste liquid mixing barrel (1), characterized in that: The circulating oxidation stirring device comprises a flow mixing tube (2) installed inside a waste liquid mixing barrel (1); a circulating oxygenation tube (3) is installed at the liquid inlet end of the flow mixing tube (2); the circulating oxygenation tube (3) is used to inject air into the circulating dirty acid waste liquid; the liquid inlet end of the circulating oxygenation tube (3) is connected to the bottom of the waste liquid mixing barrel (1); a circulating delivery pump (31) and a solenoid valve (32) are installed on the circulating oxygenation tube (3); and the circulating delivery pump (31) provides suction force for the circulating oxygenation tube (3).

2. The waste treatment equipment for comprehensive utilization of iron alum slag according to claim 1, characterized in that: A driving blade (21) is provided inside the flow mixing tube (2), a plurality of stirring rods (22) and stirring blades (23) are provided on the flow mixing tube (2), and a plurality of diffusion holes are provided on the stirring rods (22).

3. The waste treatment equipment for comprehensive utilization of iron alum slag according to claim 1, characterized in that: The inner wall of the circulating aeration pipe (3) is evenly spaced with a plurality of spiral guide vanes (33), and the inner wall of the circulating aeration pipe (3) is also evenly distributed with a plurality of gas delivery holes (34). An air guide sleeve (35) is installed on the outer side of the circulating aeration pipe (3), and the air guide sleeve (35) is used to guide the air flow to flow toward the gas delivery holes (34).

4. The waste treatment equipment for comprehensive utilization of iron alum slag according to claim 1, characterized in that: The circulating oxidation stirring device also includes a plurality of adaptive mixing and feeding devices (4), the adaptive mixing and feeding devices (4) including an assembled shell (41), a mixing wheel (42) is installed inside the assembled shell (41), a main flow hole (421) is provided at the axis position of the mixing wheel (42), a plurality of quantitative grooves (422) are provided on the outside of the mixing wheel (42), a rotating extrusion wheel (43) is also installed on the side of the mixing wheel (42), and a feeding pipe (44) is installed above the assembled shell (41).

5. The waste treatment equipment for comprehensive utilization of iron alum slag according to claim 4, characterized in that: A mixing guide track (411) is provided inside the assembled shell (41), a feed port is provided above the mixing guide track (411), a first annular baffle plate (412) and a second annular baffle plate (413) are provided inside the mixing guide track (411), regional flow holes (4121) are provided on the first annular baffle plate (412) and the second annular baffle plate (413), and a one-way flow blocking port (4131) is also provided on the second annular baffle plate (413).

6. The waste treatment equipment for comprehensive utilization of iron alum slag according to claim 5, characterized in that: A circulation installation plate (4132) is installed inside the one-way flow blocking port (4131), and a one-way flow hole is provided on the circulation installation plate (4132). A floating membrane (4133) is also installed inside the one-way flow blocking port (4131).

7. The waste treatment equipment for comprehensive utilization of iron alum slag according to claim 4, characterized in that: Each quantitative groove (422) of the mixing wheel (42) is equipped with a quantitative adjustment tool (423), and the quantitative adjustment tool (423) is used to adjust the capacity of the quantitative groove (422). The main flow hole (421) of the mixing wheel (42) is equipped with a mixing flow blade (424), and the mixing flow blade (424) causes the dirty acid waste liquid to generate a spiral flow.

8. The waste treatment equipment for comprehensive utilization of iron alum slag according to claim 4, characterized in that: A plurality of movable push plates (431) are mounted on the rotating extrusion wheel (43), a push spring (4311) is mounted between the movable push plates (431) and the rotating extrusion wheel (43), an extrusion tool (432) is mounted on the movable push plates (431), and an extrusion roller (4321) matching the quantitative groove (422) is mounted on the extrusion tool (432).

9. The waste treatment equipment for comprehensive utilization of iron alum slag according to claim 4, characterized in that: A rotating wheel (441) is rotatably mounted on the feed pipe (44), and a plurality of material-moving blades (442) are arranged inside the rotating wheel (441).

10. The waste treatment equipment for comprehensive utilization of iron alum slag according to claim 5, characterized in that: A one-way filter tube (45) is installed at the liquid outlet end of the mixing guide track (411), a conical filter layer (452) is provided inside the one-way filter tube (45), a movable sealing plug (454) is also installed inside the one-way filter tube (45), and a return spring (453) is installed between the movable sealing plug (454) and the one-way filter tube (45).

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